Cartronix CTX-3418 | Antenna adapter cable with phantom power | Din to ISO

Are you replacing the original radio in a Volkswagen, Audi, or SEAT from 1997–2001? You'll often find that the new aftermarket radio no longer has any radio reception. This is because these vehicles use an active antenna that requires power via a so-called phantom power.

The Cartronix CTX-3418 was specifically designed to solve this problem. This adapter cable ensures your original antenna continues to function correctly – with amplified reception and a seamless transition from ISO to DIN.

Why choose the CTX-3418?

✔ Solution for intermittent reception - Ideal for radio replacement
✔ For cars with active antenna (phantom powered) – Feeds the antenna via blue wire
✔ ISO to DIN – Enables the transition from the original antenna system to the DIN standard
✔ Simple Plug & Play installation – No cutting or soldering required

Typical applications

• Installing an Android or CarPlay radio in a Volkswagen, Audi or SEAT from 1997–2001
• How to fix poor radio reception after replacing the original head unit
• Connecting ISO antenna system to aftermarket radio with DIN
• Retaining original AM/FM functions with active antenna

Compatibility

The Cartronix CTX-3418 is universally applicable in vehicles with a ISO antenna connection and an active antenna (phantom power). This mainly occurs with:

• Volkswagen: Golf 3/4, Polo, Passat, Lupo, Sharan, Bora
• Audi: A3, A4, A6, TT (up to 2001 model year)
• SEAT: Ibiza, Leon, Toledo, Cordoba (1997–2001)

Please check your system beforehand to ensure compatibility.

Technical specifications

• Item Code: CTX-3418
• Connection: ISO female → DIN male
• Power: 12V phantom power via blue wire (ACC or ANT connection)
• Support: AM and FM radio
• Length: approx. 30 cm
• Compatible with: Aftermarket radios of any brand

Package contents

• 1x Cartronix CTX-3418 antenna adapter cable with phantom power

Why choose the Cartronix CTX-3418?

In older VAG models, antennas are often powered directly from the original radio. As soon as you replace this with a modern system without phantom power, the antenna simply stops working. The CTX-3418 restores that functionality and ensures crystal-clear reception – without hassle and without compromise.